These updates are often mandatory for fixing game-breaking bugs that appeared in the base version, such as the infamous "error 12" save issue or pathfinding glitches.
: Using unofficial update files from third-party sources carries risks of or malware. It is always recommended to back up your Documents/Electronic Arts/The Sims 3 folder before applying any patches. your specific version of The Sims 3 rldsim3iso upd
For broader research and regularly updated data, these professional resources are authoritative: These updates are often mandatory for fixing game-breaking